A heart pacemaker, as shown in Figure 3.15, consists of a battery, a capacitor, and the...

A heart pacemaker, as shown in Figure 3.15, consists of a battery, a capacitor, and the heart as a resistor. When the switch S is at P the capacitor charges; when S is at Q the capacitor discharges, sending an electrical stimulus to the heart. During this time the voltage E applied to the heart is given by

Where R and C are constants. Determine (Of course, the opening and closing of the switch are periodic in time, to simulate the natural heartbeat.)